Improvement in grinder or rattler for cleaning castings



inder, as shown at A and B, iig. 1.

nite tat-ea @wat etiijliw.,

Lata-s Patent No. 100,175, dated February 22, 1870.

IMPROVEMENT 4IN G-RINDER OR RATTLER IQR CLEANING CASTING-S5 The 4Schedule referred to in. these- Lettera'Patent and making part o! the same.

*HON- To all whom it may concern: f

Be it known thatI, GEORGE MILLER, of the town of Johnston, in the county of Providence, and State ot' Rhode Island. have invented a new and improved Grinder or Rattlcr for Cleaning Castings; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings making part of this specification, in which- Figure 1 is an en d elevation of my improved grinder.

Figure 2 is a t'rontelevation of the same.

Similar letters indicate like parts in both figures.

My improvedgmachine is intended more particularly to grind off the sand and smoothly finish the larger pieces of castings, and to that end is constructed with capacity -and convenience to receive such castings,

and with power to rotate a cylinder carrying a heavy v load of large shapes of met-al.

The first part ot' my invention relates to the construction ot' the cylinder, and consists in making the same with two metallic or wooden heads, with a lagging of thick plank or meta-l, forming the sides or barrel, said lagging being in pla-ne sections, forming a number, say four, six, eight, or twelve planes around the cylinder-heads, with nearly or quite half their number removable, for introducing and removing the casting from the cylinder conveniently, regardless of their size or form.

The second part of my invention relates to the mode of mounting and rotating such a cylinder, and consists `in elevating the cylinder upon asetof rollers, two upon each side, upon which the circumference of the two heads ot' the ,cylinder rests, so that the surfaces ofthe two heads revolve upon and with the surfaces ofthe four rollers when power is applied directly to the cylinder, or the power may be applied through the medium of the rollers, the rotation of which is communicated to and drives the cylinder.

In the drawings- G is the cylinder, the two heads being generally of cast-iron, and the body of sections of plank D D D, 85e., as represented, twelve in numberhthe cylinder being, say four or ive feet in diameter, the ends ot' a portion ot' these plank sectionsare securely bolted to the. two heads, while those numbered one, two, three, four, tive, are removable, being fitted to slide, one after the other in the order of the numbers, from their position at a tangent to the circumterence of the cyl- By this means a sufficient portion of the side or body ofthe-cylinder may be readily removed to admit the heavy and bulky pieces ot' casting to arrange the 'same suitably within the cylinder, and ll up the intervening space with' cinders or other material suitable for polishing the same.

`lhe'cylinder is supported by its two heads resting on the rollers E E on the shafts O, having bearings o at each end in the frame M, equidistant from the axis of the cylinder.

Each roller is provided with a flange, f, to keep the cylinder in place, and the roller-shafts are connected in their movements by a gear, L L, on each,v and an intermediate gear, N, on the shaft H, on which the driving-pulleys I are placed, by which this and the roller-shafts are driven by any rst mover, the weight ofthe material in the cylinder contributing to increase the traction between the surfaces of its heads and that of' the rollers upon which its rests, and vfrom which it thus derives its rotative force or movement. yInstead of rotating the cylinder by means ot' the rollers E E, in the ma/nner just described, I propose, should it be deemed advantageous or necessary from any cause, to simply mount the cylinders upon such rollers, as a means of rotation, in lien of the shaft or axle at its center upon which it- Ahas hitherto been mounted and rotated, and by means of a segmental rack or gear on the cylinderhead, and a pinion meshing therewith, to drive the cylinder in the usual-,way independent of the rollers -E E, or, if need be, fordit'-` ferent classes of work; to use either or both means of rotatingvthe cylinder, the peculiar method of mounting'the cylinder on rollers with its advantages for carrying the rotating cylinder being retained in both cases.

Having described my invention, What I claim and desire to secure by Letters Pat ent isl. The cylinder, constructed with two heads G and 4 a sectional lagging or body, D, a portion-of which is removable by sections, substantially as and for the purpose speci-lied.

2. The 'roller E, when combinedand arranged with the cylinder G, as described.

In testimony whereof I have hereunto subscribed my name this 21st day of December, 1869.

GEORGE MILLER.

Witnesses:

IsAAc A. BROWNELL, ALFRED B..IRONs. 

